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Manufacturers & Exporters Of :  Gas Monitoring Systems
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Gassense Remote Gas Sensor For Gasalarm



The fixed monitoring system consists of two parts:

1. Monitoring - Model gasalarm

2. Sensing - Model gassens

Model gasalarm - The monitoring unit consists of :

a) Power Supply Card: Size - 220 mm X 100 mm Supplies Power (9 V DC to 24 V DC)
    to complete system including gas detector assembly (Field Unit) with a current
   carrying capacity of one card is maximum up to 5 Amp. Which can cater up to 10
   cards in one rack. Multiple numbers of cards in multiple numbers of Racks in one
   panel can be provided if the numbers of channels are more than ten.

b) Control card: Control card provides fixed voltage & current required to the field unit.
    It also accepts 4 - 20 mA. Signal from field unit. This signal is then processed by control
   card using instrumentation amplifier. The processed signal is with respect to the gas
   concentration available in the field, which is displayed by two or three digit 7 segments
   LED by control card display section. Two level alarms (latching/non latching type)
   are generated if the gas concentration is above preset limit. Fault alarm also is provided
   on the control card in case of sensor open/ short, cable from sensor is open/ short &
   under range/ over range conditions appear. The control card also delivers 4 - 20 mA.
   (repeater) output Signal.

c) Facility Card: This card receives the alarm condition signal from control card. Depending
   upon the alarm conditions it activates the relays mounted on it & hoots the buzzer
   or siren or sends control signal to the pre-desired device. It also complies alarm
   ACCEP, RESET & LAMP TEST conditions. The Push buttons are provided on the
   fascia plate to achieve the desired job.

d) Mother Board: This board is provided on the back of 19" rack. The Mother Board PCB is
   provided with the copper tracks & Euro Connectors to hold all the cards like Control
   Card, Power Supply Card & Facility card. With the help of proper design
   reduces the back panel wiring of all cards & makes the system work efficiently.

e) 19" DIN standard Rack: All the above cards are housed in the 19: DIN standard
    control rack. This rack is then fitted in the control panel.

f) Control Panel: The 19" rack is fitted in the control panel. Panel also is incorporated
   to house step-down transformer, Local hooter required wiring with elmech connectors
  & Relays for controlling. Control panels are available in wall mounting type or
  free standing floor mounting type.

Model gaZsens - The gas detector assembly (Field Unit) consists of:

a) Gas Sensor: Gas sensors are imported from UK. Different gas sensors are
    then mounted on sensor PCB that is then housed in sensor housing.

b) CCOE Approved Explosion Proof Sensor Housing: In the industry, as per the safety
    regulations any equipment fitted in the hazardous area should be Explosion
    proof. Hence, these sensors housed in sensor housing are supposed to be tested
    & approved. PPS make sensor housing Model: gaZsens SH is tested by ERTL
    for Explosion proof as per IS 2148 & approved by CCOE both Indian
    government authorized bodies.
c) Flame Proof Junction Box: The sensor Housing is then fitted with Flame proof Junction 
    box, which also is tested by CMRI a government approved body.

d) 4 - 20 mA. Transmitter: 4 - 20 mA. Transmitter are developed by PPS like all the
   other units & cards. These transmitters are of two types:

    A. Two wire 4 - 20 mA. transmitters: Used for Toxic & Oxygen monitoring system.

    B. Three wire 4 - 20 mA. transmitters: Used for Combustible Gas Monitoring system.

e) Flame Proof Cable Glands: Tested & approved by CMRI & are used for
    Cable entry in the Junction Box.

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